Following is an example of a polynomial trendlines chart. We’ve already seen the configuration used to draw this chart in the Google Charts Configuration Syntax chapter. So, let’s see the complete example.
Configurations
We’ve used trendlines configuration to show trendlines diagram.
var options = {
trendlines: { 0: {
type: 'polynomial',
degree: 3,
visibleInLegend: true,}
} // Draw a trendline for data series 0.
};
Example
googlecharts_trendlines_polynomial.htm
<html>
<head>
<title>Google Charts </title>
<script type = "text/javascript" src = "https://www.gstatic.com/charts/loader.js">
</script>
<script type = "text/javascript" src = "https://www.google.com/jsapi">
</script>
<script type = "text/javascript">
google.charts.load('current', {packages: ['corechart']});
</script>
</head>
<body>
<div id = "container" style = "width: 550px; height: 400px; margin: 0 auto">
</div>
<script language = "JavaScript">
function drawChart() {
// Define the chart to be drawn.
var data = new google.visualization.DataTable();
data.addColumn('number', 'Age');
data.addColumn('number', 'Weight');
data.addRows([
[ 8, 12],
[ 4, 5.5],
[ 11, 14],
[ 4, 5],
[ 3, 3.5],
[ 6.5, 7]
]);
// Set chart options
var options = {
'title':'Age vs Weight',
'width':550,
'height':400,
'legend': 'none',
trendlines: { 0:
{
type: 'polynomial',
degree: 3,
visibleInLegend: true,
}
} // Draw a trendline for data series 0.
};
// Instantiate and draw the chart.
var chart = new google.visualization.ScatterChart(document.getElementById('container'));
chart.draw(data, options);
}
google.charts.setOnLoadCallback(drawChart);
</script>
</body>
</html>
Result
Verify the result.
